Measurement of Spinal Kinematics During Various Movements

Inclusion Criteria: \- sufficient French level to understand the instructions for the tests, the information sheet, the consent form. For CLBP patients: \- diagnosis of non-specific low back pain (pain from lower ribs to gluteal folds) for more than 3 months. For asymptomatic participants: * no history of LBP requiring medical attention during the last two years * no other concomitant pain or condition that could compromise the evaluation of lumbar kinematics. Exclusion Criteria: * pregnancy * skin allergy to tape * body mass index (BMI) above 32 For patients with CLBP only: * specific low back pain (such as the presence of infection, rheumatological or neurological diseases, spinal fractures, tumours) * any known important spinal deformities * previous back surgery that limits spinal mobility * high level of pain at the time of experiment that prevents repeated movements (severity and irritability) * other concomitant pain or condition that could compromise the evaluation of spinal kinematics.